Antioxidant activity of macromolecular compounds of humic etiology

Abstract

Dependance of antioxidant activity of the humic macromolecular compounds from their etiology and production method was learned by means of physical-chemical analysis methods - colorimetry with diphenylpicrylhydrazyl (DPPH) as a stable radical, cathodic voltammetry, electron paramagnetic resonance spectroscopy. 18 native humic acids (HAs) were isolated by extraction from nine typical species of peats of the Tomsk region, that differ from each other by botanical composition, degree of decomposition and ash content. Two extragents were used: sodium hydroxide and sodium pyrophosphate. Although all 18 HAs samples exhibit antioxidant activity. At the same time there is a similar trend in the distribution of antioxidant activity, which is proved by Spearman's correlation analysis. A higher activity was noted for pyrophosphate HAs. Using methods of cathodic voltammetry and colorimetry with DPPH it was found that HAs show antioxidant activity by its mechanism, being a proton donor due to the presence of a large number of phenolic hydroxyls. EPR spectroscopy established that the HAs are traps of free radicals.

Original language	English
Pages (from-to)	239-250
Number of pages	12
Journal	Khimiya Rastitel'nogo Syr'ya
Issue number	3
DOIs	https://doi.org/10.14258/jcprm.2018033925
Publication status	Published - 1 Jan 2018

Keywords

Antioxidants
Colorimetry
Diphenylpicrylhydrazyl
Free radicals
Humic acids
Peat
Spectroscopy
Voltammetry

ASJC Scopus subject areas

Biomaterials
Plant Science
Organic Chemistry

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Zykova, M. V., Logvinova, L. A., Krivoshchekov, S. V., Voronova, O. A., Lasukova, T. V., Bratishko, K. A., Zholobova, G. A., Golubina, O. A., Perederina, I. A., Drygunova, L. A., Tveryakova, E. N., & Belousov, M. V. (2018). Antioxidant activity of macromolecular compounds of humic etiology. Khimiya Rastitel'nogo Syr'ya, (3), 239-250. https://doi.org/10.14258/jcprm.2018033925

Antioxidant activity of macromolecular compounds of humic etiology. / Zykova, M. V.; Logvinova, L. A.; Krivoshchekov, S. V.; Voronova, O. A.; Lasukova, T. V.; Bratishko, K. A.; Zholobova, G. A.; Golubina, O. A.; Perederina, I. A.; Drygunova, L. A.; Tveryakova, E. N.; Belousov, M. V.

In: Khimiya Rastitel'nogo Syr'ya, No. 3, 01.01.2018, p. 239-250.

Research output: Contribution to journal › Article

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abstract = "Dependance of antioxidant activity of the humic macromolecular compounds from their etiology and production method was learned by means of physical-chemical analysis methods - colorimetry with diphenylpicrylhydrazyl (DPPH) as a stable radical, cathodic voltammetry, electron paramagnetic resonance spectroscopy. 18 native humic acids (HAs) were isolated by extraction from nine typical species of peats of the Tomsk region, that differ from each other by botanical composition, degree of decomposition and ash content. Two extragents were used: sodium hydroxide and sodium pyrophosphate. Although all 18 HAs samples exhibit antioxidant activity. At the same time there is a similar trend in the distribution of antioxidant activity, which is proved by Spearman's correlation analysis. A higher activity was noted for pyrophosphate HAs. Using methods of cathodic voltammetry and colorimetry with DPPH it was found that HAs show antioxidant activity by its mechanism, being a proton donor due to the presence of a large number of phenolic hydroxyls. EPR spectroscopy established that the HAs are traps of free radicals.",

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author = "Zykova, {M. V.} and Logvinova, {L. A.} and Krivoshchekov, {S. V.} and Voronova, {O. A.} and Lasukova, {T. V.} and Bratishko, {K. A.} and Zholobova, {G. A.} and Golubina, {O. A.} and Perederina, {I. A.} and Drygunova, {L. A.} and Tveryakova, {E. N.} and Belousov, {M. V.}",

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AU - Logvinova, L. A.

AU - Krivoshchekov, S. V.

AU - Voronova, O. A.

AU - Lasukova, T. V.

AU - Bratishko, K. A.

AU - Zholobova, G. A.

AU - Golubina, O. A.

AU - Perederina, I. A.

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AU - Tveryakova, E. N.

AU - Belousov, M. V.

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